Abstract:
As a kind of mining technology without coal pillar, top-cutting and pressure relief roadway-retaining along goaf can improve the recovery and utilization rate of coal resources, boost the continuity of mine production, and increase the economic benefits of coal enterprises.In order to solve the problems of alternating tension of working face and low recovery rate of coal resources, this paper takeing transportation roadway of 18505 fully-mechanized mining face in Malan Mine of Shanxi Xishan Coal Power Co.,Ltd.,as the research object, and through the research method of combining theoretical calculation and engineering practice, carries out the design of the technology scheme of roadway-retaining along goaf and related research on the surrounding rock control measures of the roadway.The technical scheme of retaining roadway along the goaf is proposed by using “pre-split blasting roof-cutting+constant resistance large deformation anchor cable reinforcement support”.According to the actual on-site monitoring results, after 30 days of roadway retaining, the deformation of surrounding rock of the roadway basically tends to be stable, the maximum deformation of the roof and floor is 178.26 mm, and the maximum deviation of the two sides of the roadway is 85.34 mm, which fully conforms to the practical application standard of roadway retaining along the goaf and ensures the safe mining of working face.